PBM_MONO         7434 src/image.c          raw_p = 0, type = PBM_MONO;
PBM_MONO         7446 src/image.c          raw_p = 1, type = PBM_MONO;
PBM_MONO         7467 src/image.c      if (type != PBM_MONO)
PBM_MONO         7489 src/image.c      if (type == PBM_MONO)